Trissopelopia longimana

Author: (Staeger, 1839)

Exuviae 5.9-6.6mm long (m=6.3mm, n=6) (020-2.jpg).
Cephalothorax: Thoracic horn 345-420µm long (m=398µm, n=8); ThR 2.4-4.0 (m=3.1, n=7). Plastron plate 120x50-145x75µm (n=7); rim 215x85-265x130µm; apex of horn atrium with a reflexed swelling below the plastron plate; rim over half the length of the horn (020e.jpg). Thorax granulate anteriorly.
Abdomen: Tergite I with a median mark. Tergite armament of points grouped in short transverse rows (020-2.jpg). Anterior lateral taenia of segment VII at 0.46-0.59 of length segment VII (m=0.53, n=6).
Anal segment: Anal lobes with external edge thickened from posterior lateral taenia to apex, toothed externally (020f.jpg). Anal lobe ratio 2.7-3.0 (n=6).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 80: Tanypodinae 66 Trissopelopia of the Text Key.

Widespread in Europe and north Africa.
(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Stagnant and flowing water.